From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id D920CC433F5 for ; Wed, 30 Mar 2022 15:38:25 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1348287AbiC3PkJ (ORCPT ); Wed, 30 Mar 2022 11:40:09 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:39144 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346546AbiC3PkH (ORCPT ); Wed, 30 Mar 2022 11:40:07 -0400 Received: from mail-pj1-x102d.google.com (mail-pj1-x102d.google.com [IPv6:2607:f8b0:4864:20::102d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id DD7456AA52 for ; Wed, 30 Mar 2022 08:38:21 -0700 (PDT) Received: by mail-pj1-x102d.google.com with SMTP id jx9so20989751pjb.5 for ; Wed, 30 Mar 2022 08:38:21 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=bytedance-com.20210112.gappssmtp.com; s=20210112; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=IKVFgArMfLAYb/4tYUuGf6KEnDE92hMEQ9mU5hp/SXo=; b=y426lP1h9/gpMDvFsvkQcsWTR6r4t0uNFPGCXcCkQ0w4bDDfbd2I6w3MPvmSngD5aQ 9UHKY99m4xTMn2S+VEWYRysvmEDjOdp+p+AaJE9UQlAtOAg9nnObmnt7SD/llMP+ydXX tEoTC4CvY+Alaz3nGiPuulcsMVs4yV+CghqyvhjrIdjT4SEbjXtkkYdOiUQNNPovNO65 zooFZEF1EAKY+iSmwmGDYeeIlMmOyMmQg3y3cSgjUo/6mm1bLvfygA1ZudpOBLvdKOnK IAyYWShhvc4qIrg9j5+ZR6S93sOYQk7CUSaTKoYVYl/japXdL0WlkQnS9qvagsSwyJE5 F5Uw== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=IKVFgArMfLAYb/4tYUuGf6KEnDE92hMEQ9mU5hp/SXo=; b=HzneB2fpLxeP+GTnh3OsJdwJKVc/gTMXGOzxVOghf8KkolHNjm01WwLS/jZM0C08Ww gYrzccUEdzIoj8qz4QZ/RD3A6BDK+6SO/wzlViB2NQoduvb4WQgUb2vDdLnLC/o9V8m3 jRxAEGyY3ddlaj1Q75C6c1g7MqH56p+zNRFhnM8QxmooZd99QJZhZkf4DAXHUW9viCFQ XczxmScQoUz7WtLpuhXX6P0J7f1Ybvl/uqv8az5lYMb1N8WfHTj7qQ+3Pk2hD3Dcp7jb yMa/iNLKWw7jKJb7rP/QxaRd68/nZ9S4iSNcxcDshyglP5gYc9k5/Jo/Lrqhdck+Der5 pDig== X-Gm-Message-State: AOAM5312vAkfXRW4nyvyz/zUrvxdIsnuVuzVEdG5v+9gb4Zz+XIDwdoC gE5aVi6NMMLesvIHcz87A6g8qg== X-Google-Smtp-Source: ABdhPJyx8KyO7z1oyOwVys9x6GkHA4ruaJjbZc4MyGqZcrWkQvN5DIzM1+TzQgmsyw0Tgim4c9azmA== X-Received: by 2002:a17:902:d3c5:b0:154:a3b5:d918 with SMTP id w5-20020a170902d3c500b00154a3b5d918mr161632plb.91.1648654701358; Wed, 30 Mar 2022 08:38:21 -0700 (PDT) Received: from FVFYT0MHHV2J.bytedance.net ([139.177.225.239]) by smtp.gmail.com with ESMTPSA id y8-20020a17090aa40800b001c6ccb2c395sm6686039pjp.9.2022.03.30.08.38.15 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 30 Mar 2022 08:38:21 -0700 (PDT) From: Muchun Song To: corbet@lwn.net, mike.kravetz@oracle.com, akpm@linux-foundation.org, mcgrof@kernel.org, keescook@chromium.org, yzaikin@google.com, osalvador@suse.de, david@redhat.com, masahiroy@kernel.org Cc: linux-doc@vger.kernel.org, linux-kernel@vger.kernel.org, linux-mm@kvack.org, duanxiongchun@bytedance.com, smuchun@gmail.com, Muchun Song Subject: [PATCH v6 0/4] add hugetlb_free_vmemmap sysctl Date: Wed, 30 Mar 2022 23:37:41 +0800 Message-Id: <20220330153745.20465-1-songmuchun@bytedance.com> X-Mailer: git-send-email 2.32.0 (Apple Git-132) MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This series is based on next-20220310. This series amis to add hugetlb_free_vmemmap sysctl to enable the feature of freeing vmemmap pages of HugeTLB pages. v6: - Remove "make syncconfig" from Kbuild. v5: - Fix not working properly if one is workig off of a very clean build reported by Luis Chamberlain. - Add Suggested-by for Luis Chamberlain. Thanks. v4: - Introduce STRUCT_PAGE_SIZE_IS_POWER_OF_2 inspired by Luis. v3: - Add pr_warn_once() (Mike). - Handle the transition from enabling to disabling (Luis) v2: - Fix compilation when !CONFIG_MHP_MEMMAP_ON_MEMORY reported by kernel test robot . - Move sysctl code from kernel/sysctl.c to mm/hugetlb_vmemmap.c. Muchun Song (4): mm: hugetlb_vmemmap: introduce STRUCT_PAGE_SIZE_IS_POWER_OF_2 mm: memory_hotplug: override memmap_on_memory when hugetlb_free_vmemmap=on sysctl: allow to set extra1 to SYSCTL_ONE mm: hugetlb_vmemmap: add hugetlb_free_vmemmap sysctl Documentation/admin-guide/sysctl/vm.rst | 14 ++++ Kbuild | 15 ++++- include/linux/memory_hotplug.h | 9 +++ include/linux/mm_types.h | 2 + include/linux/page-flags.h | 3 +- kernel/sysctl.c | 2 +- mm/hugetlb_vmemmap.c | 109 ++++++++++++++++++++++++-------- mm/hugetlb_vmemmap.h | 8 ++- mm/memory_hotplug.c | 27 ++++++-- mm/struct_page_size.c | 20 ++++++ 10 files changed, 171 insertions(+), 38 deletions(-) create mode 100644 mm/struct_page_size.c -- 2.11.0